Pure amino acid. Suitable for vegetarians. Sugar, salt and starch free. Solgar's Chelated Copper Tablets are free of corn, yeast, wheat, soy and dairy products and are formulated without the use of preservatives, artificial flavors or colors. Solgar's Chelated Copper Tablets are manufactured under license agreements with Albion Laboratories whose patents and pending patents cover the complexing of minerals with pure amino acids.